Shortcut for "disable object in the viewport" (DOV) Blender 2.8
I know your question was asked many months ago, but in case you never found an answer, you can assign a shortcut for 'Disable In Viewports' by rightclicking the 'Disable In Viewports' icon in the outliner and clicking the 'Assign Shortcut' submenu 

1 enable DIV icon in outliner



2 rightclick DIV to assign shortcut